Blow molding clamp

Abstract

The utility model provides a blow molding clamp which comprises a base, two mold boxes are connected to the base through linear guide rails and sliding blocks, and open cavities are formed in the opposite faces and the tops of the two mold boxes. A bearing assembly, a centering clamping assembly and an auxiliary locking assembly are arranged in the mold box; the bearing assembly comprises a bearing base plate and a supporting plate on the bottom face of the bearing base plate. The centering clamping assembly comprises a lead screw and a guide rod below the bearing assembly, threaded sections with opposite spirals are arranged at the two ends of the lead screw, clamping plates are symmetrically arranged on the two sides of the supporting plate, and the lower portions of the clamping plates are connected with the lead screw and the guide rod through vertical plates. The auxiliary locking assembly is arranged on the upper surface of the bearing base plate and used for auxiliary fixing of the mold. According to the blow molding clamp provided by the utility model, the linear guide rail, the sliding block and the centering clamping assembly are matched, so that the deviation of the movement track of the mold box is reduced, the positioning precision of repeated mold closing is improved, the automatic centering clamping of the mold is realized, and the accurate alignment between two molds is ensured.

Description

Technical Field

[0001] This utility model relates to the field of blow molding equipment technology, and in particular to a blow molding fixture. Background Technology

[0002] Blow molding, also known as hollow blow molding, is a plastic processing method. It involves placing a hot tubular plastic preform, obtained by extrusion or injection molding of thermoplastic resin, between two molds in a blow molding machine. After the mold is closed, compressed air is immediately introduced into the preform (i.e., blow molding), causing the plastic preform to inflate and adhere tightly to the inner wall of the mold. After cooling, it is demolded to obtain various hollow products.

[0003] During blow molding, two opposing molds on the blow molding machine are clamped together by a blow molding fixture. The fixture locks the two halves together and applies a mutual clamping force to counteract the blow molding force that could separate the two halves. In existing technology, the blow molding fixture only serves to fix the mold, and the opening and closing of the fixture and mold is controlled by a drive device. However, precise positioning of the mold cannot be achieved during this process. After prolonged use, the relative position between the two molds may deviate, severely affecting the blow molding process of the workpiece. Utility Model Content

[0004] This utility model provides a blow molding fixture to solve the problem that existing blow molding fixtures cannot achieve precise positioning of the mold.

[0005] This utility model provides a blow molding fixture, comprising: a base, with two linear guide rails arranged parallel to each other on the upper part of the base, and two relatively movable mold boxes connected to the linear guide rails by sliders, the opposite surfaces and tops of the two mold boxes forming open cavities; a bearing assembly, including a bearing base plate inside the mold box and support plates at both ends of its bottom surface, the two support plates being aligned with the inner sides of the opposite surfaces of the mold boxes and fixed to the bottom plate of the mold box; a centering clamping assembly, including a lead screw and a guide rod located below the bearing assembly and mounted between the two side walls of the mold box, the lead screw being mounted through a bearing seat, the two ends of the lead screw having threaded sections with opposite helices, one end also being connected to a motor, clamping plates symmetrically arranged on both sides of the support plate, a vertical plate connected below the clamping plates, the vertical plate having a drive nut that mates with the threaded sections and a guide sleeve that mates with the guide rod; and an auxiliary locking assembly, disposed on the upper surface of the bearing base plate, for auxiliary fixing of the mold.

[0006] Optionally, the auxiliary locking assembly includes a vertically arranged positioning base plate, which is fixed to the upper surface of the bearing base plate. A linear drive mechanism is installed on the side of the positioning base plate away from the opposite side of the mold box. The output end of the linear drive mechanism passes through the positioning base plate and is connected to the movable pressure plate. Multiple guide posts are fixed on the side of the movable pressure plate near the positioning base plate. Multiple guide holes that cooperate with the guide posts are opened on the positioning base plate. An adaptive locking mechanism is also provided on the side of the movable pressure plate away from the positioning base plate.

[0007] Optionally, the adaptive locking mechanism includes mounting seats fixed to the four corners of the movable pressure plate, a column connecting two mounting seats on the same side, multiple vertical adjustment blocks slidingly connected to the column along the axial direction, and a horizontal adjustment component provided between two vertical adjustment blocks of the same height.

[0008] Optionally, the horizontal adjustment assembly includes a horizontal slide rod connecting two vertical adjustment blocks of the same height. Each horizontal slide rod has two adjustable pressure plates symmetrically arranged on it, and the adjustable pressure plates are slidably connected to the horizontal slide rod. The adjustable pressure plates are provided with threaded holes. Fastening bolts are also provided on the vertical adjustment blocks and the adjustable pressure plates.

[0009] Optionally, a limit block is also provided at the end of the guide post.

[0010] Optionally, a flange is provided on the outer wall of the opposite side of the mold box.

[0011] Optionally, a rectangular discharge port is provided at the center of the bottom of the base.

[0012] The beneficial effects of the blow molding fixture provided by this utility model include: 1. By cooperating with the linear guide rail and the slider, the deviation of the mold box movement trajectory is reduced, and the positioning accuracy of repeated mold closing is improved.

[0013] 2. By using the centering clamping component, automatic centering clamping of the mold is achieved, ensuring precise alignment between the two molds.

[0014] 3. By using an adaptive locking mechanism, it is possible to adapt and lock molds of different sizes, thereby improving the compatibility of the fixture. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the blow molding fixture provided in an embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the mold box in the blow molding fixture provided in this embodiment of the utility model;

[0018] Figure 3 A schematic diagram of the centering clamping assembly provided in this embodiment of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the auxiliary locking assembly provided in an embodiment of the present utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the blow molding fixture used to hold the mold in an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1-Base, 2-Mold box, 3-Bearing component, 4-Centering clamping component, 5-Auxiliary locking component, 10-Rectangular discharge port, 11-Linear guide rail, 12-Slider, 20-Flange, 31-Bearing base plate, 32-Support plate, 41-Screw rod, 42-Guide rod, 43-Shaft seat, 44-Threaded section, 45-Motor, 46-Clamping plate, 47-Vertical plate, 48-Drive nut, 49-Guide sleeve, 51-Positioning base plate, 52-Linear drive mechanism, 53-Modible pressure plate, 54-Guide column, 55-Guide hole, 56-Adaptive locking mechanism, 541-Limit block, 561-Mounting seat, 562-Column, 563-Vertical adjustment block, 564-Horizontal adjustment component, 565-Horizontal slide bar, 566-Adjustable pressure plate, 567-Threaded hole, 568-Fasting bolt. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this utility model.

[0024] like Figure 1-5As shown, this utility model provides a blow molding fixture, including: a base 1, with two linear guide rails 11 arranged parallel to each other on the upper part of the base 1, and two relatively movable mold boxes 2 connected to the linear guide rails 11 by sliders 12, the opposite surfaces and tops of the two mold boxes 2 forming open cavities; a bearing assembly 3, including a bearing base plate 31 inside the mold box 2 and support plates 32 at both ends of its bottom surface, the two support plates 32 being aligned with the inner sides of the opposite surfaces and opposite back surfaces of the mold box 2 respectively and fixedly connected to the bottom plate of the mold box 2; and a centering clamping assembly 4, including positioning... Below the bearing assembly 3, between the two side walls of the mold box 2, there are lead screws 41 and guide rods 42. The lead screw 41 is installed through a bearing seat 43. Both ends of the lead screw 41 are provided with threaded sections 44 with opposite helices. One end is also connected to a motor 45. The support plate 32 is provided with clamping plates 46 symmetrically on both sides. A vertical plate 47 is connected below the clamping plate 46. The vertical plate 47 is provided with a drive nut 48 that cooperates with the threaded section 44 and a guide sleeve 49 that cooperates with the guide rod 42. The auxiliary locking assembly 5 is set on the upper surface of the bearing base plate 31 and is used for auxiliary fixing of the mold.

[0025] The main structure of the blow molding fixture includes a base 1 and a mold box 2. The base 1 is used to support and control the movement of the mold box 2, while the mold box 2 is used to position and clamp the mold 6. A linear guide rail 11 is provided on the base 1. The mold box 2 can move linearly on the linear guide rail 11 by cooperating with the slider 12 at the bottom of the mold box 2. The mold box 2 is equipped with a bearing component 3, a centering clamping component 4, and an auxiliary locking component 5. The bearing component 3 is used to place the auxiliary locking component 5 and the mold 6. The centering clamping component 4 is used to clamp and adjust the position of the mold 6 so that the mold 6 is located in the center position of the bearing component 3. The auxiliary locking component 5 is used to help fix the mold 6.

[0026] When positioning and clamping mold 6, mold 6 needs to be placed on the support base plate 31 of the support assembly 3. Then, the motor 5 is started, and the lead screw 41 begins to rotate under the drive of the motor 5. The threaded sections 44 at both ends of the lead screw 41, which rotate in opposite directions, also rotate simultaneously. The rotating threaded sections 44, in conjunction with the drive nut 48, drive the vertical plate 47 and the clamping plate 46 to move synchronously towards the center. The guide rod 42 and the guide sleeve 49 cooperate to assist the movement of the vertical plate 47. The threaded sections 44 at both ends of the lead screw 41 have opposite helices. With the control of only one motor 45, the clamping plates 46 on both sides of the support plate 32 can move synchronously towards the center, thereby clamping the mold 6 in the middle position of the support plate 32. After the position of the mold 6 is determined, the mold 6 can be further locked by the auxiliary locking assembly 5.

[0027] At this point, the molds 6 in the two mold boxes 2 are perfectly symmetrical. During mold closing, the mold boxes 2 move on the linear guide rail 11, ensuring that the relative positions of the two mold boxes 2 remain unchanged. In other words, the centering clamping assembly 4 ensures the consistency of the mold 6's position within the mold box 2, and the linear guide rail 11 ensures the consistency of the relative positions between the two mold boxes 2. Through the cooperation of these two components, precise positioning between the two molds 6 can be achieved during installation and use, preventing deviations in the relative positions of the molds 6 during opening and closing, which could lead to blow molding failure.

[0028] like Figure 3-5 As shown, the auxiliary locking assembly 5 further includes a vertically arranged positioning base plate 51, which is fixed to the upper surface of the bearing base plate 31. A linear drive mechanism 52 is installed on the side of the positioning base plate 51 away from the mold box 2. The output end of the linear drive mechanism 52 passes through the positioning base plate 51 and is connected to the movable pressure plate 53. Multiple guide posts 54 are fixed on the side of the movable pressure plate 53 near the positioning base plate 51. Multiple guide holes 55 that cooperate with the guide posts 54 are opened on the positioning base plate 51. An adaptive locking mechanism 56 is also provided on the side of the movable pressure plate 53 away from the positioning base plate 51.

[0029] The auxiliary locking assembly 5 works in conjunction with the centering clamping assembly 4 to lock the mold 6 within the mold box 2. During use, the linear drive mechanism 52 pushes the movable pressure plate 53 to a preset position, and then the self-adaptive locking mechanism 56 locks the mold 6 in place. During the pushing process, the guide post 54 engages with the guide hole 55 to ensure the movable pressure plate 53 maintains a stable direction of movement. The linear drive mechanism 52 can be any commonly used drive device such as a hydraulic cylinder or a telescopic cylinder.

[0030] like Figure 3-5 As shown, the adaptive locking mechanism 56 further includes mounting seats 561 fixed to the four corners of the movable pressure plate 53. A column 562 is connected between two mounting seats 561 on the same side. Multiple vertical adjustment blocks 563 are slidably connected to the column 562 along the axial direction. A horizontal adjustment assembly 564 is also provided between two vertical adjustment blocks 563 of the same height. Further, the horizontal adjustment assembly 564 includes a horizontal slide rod 565 connecting two vertical adjustment blocks 563 of the same height. Two adjustable pressure plates 566 are symmetrically arranged on each horizontal slide rod 565. The adjustable pressure plates 566 are slidably connected to the horizontal slide rods 565. Threaded holes 567 are opened on the adjustable pressure plates 566. Fastening bolts 568 are also provided on the vertical adjustment blocks 563 and the adjustable pressure plates 566.

[0031] The adaptive locking mechanism 56 is installed on the movable pressure plate 53, and the distance between the adaptive locking mechanism 56 and the mold 6 is controlled by the linear drive mechanism 52. With the help of the vertical adjustment block 563 and the horizontal adjustment component 564, the positioning in the XYZ directions can be achieved. Specifically, when locking the mold 6, the linear drive mechanism 52 first pushes the adaptive locking mechanism 56 to the installation position (i.e., where the mold 6 is located). Then, the appropriate locking height is adjusted by the vertical adjustment block 563. The adjustable pressure plate 566 is slid on the horizontal slide bar 565 so that the adjustable pressure plate 566 is in close contact with the outer wall of the mold 6. Then, the mold 6 and the adjustable pressure plate 566 are locked together by bolts through the preset threaded holes 567. After the adjustable pressure plate 566 and the mold 6 are locked together, the vertical adjustment block 563 and the adjustable pressure plate 566 are fastened to the column 562 and the horizontal slide bar 565 respectively by the fastening bolts 568 (or the vertical adjustment block 563 and the adjustable pressure plate 566 can be fastened first, and then the mold 6 and the adjustable pressure plate 566 are locked together, depending on the situation).

[0032] The adjustable pressure plate 566 in the adaptive locking mechanism 56 can move horizontally via the horizontal slide bar 565 and vertically via the column 562. The two work together to install and fasten molds 6 of different sizes, improving the flexibility of the fixture.

[0033] like Figure 4 As shown, a limit block 541 is further provided at the end of the guide post 54.

[0034] A limiting block 541 is added to the end of the guide post 54 to limit the stroke of the guide post 54 and prevent the guide post 54 from coming out of the guide hole 55.

[0035] like Figure 1 As shown, a flange 20 is further provided on the outer wall of the back side of the mold box 2.

[0036] A flange 20 is provided on the outer wall of the opposite side of the mold box 2. The flange 20 can be connected to a drive device such as a hydraulic cylinder, pneumatic cylinder, motor, etc., so as to drive the mold box 2 to move on the linear guide rail 11.

[0037] like Figure 5 As shown, a rectangular discharge port 10 is further provided at the center of the bottom of the base 1.

[0038] After blow molding is completed, the mold is opened, and the molded plastic product falls from the rectangular discharge port 10 for collection, so as to carry out the next step of processing.

[0039] The complete working process of the blow molding fixture provided by this utility model is as follows:

[0040] like Figure 1-5 As shown, in the blow molding fixture, the mold 6 is first placed on the support base plate 31 fixed at the bottom of the mold box 2. Then, the linear drive mechanism 52 is activated, driving the movable pressure plate 53 to the mold 6. Next, the adjustable pressure plate 566 in the adaptive locking mechanism 56 is adjusted to a suitable position and then locked to the mold 6 and the adjustable pressure plate 566 using bolts (not shown in the figure) through the preset threaded holes 567. After the mold 6 and the adjustable pressure plate 566 are locked, the linear drive mechanism 52 is activated again to fine-tune the position of the mold 6 so that the opposite surface of the mold 6 is flush with the opposite surface of the mold box 2. Then, the motor 5 is activated, and the lead screw 41 begins to rotate under the drive of the motor 5. The opposing threaded sections 44 at both ends of the lead screw 41 also rotate simultaneously. The rotating threaded sections 44, in conjunction with the drive nut 48, drive the vertical plate 47 and the clamping plate 46 to move synchronously towards the center, thereby moving the mold 6 to the center position of the support base plate 31. At this point, the vertical adjustment block 563 and the adjustable pressure plate 566 are then fastened to the column 562 and the horizontal slide bar 565 respectively by tightening bolts 568, thus completing the positioning and fixing of mold 6.

[0041] After the mold 6 is fixed, an external drive device is connected to the flange 20 on the outside of the mold box 2 to control the mold box 2 to drive the mold 6 to open and close. When opening and closing the mold, the mold box 2 slides on the linear guide rail 11 through the slider 12, thereby ensuring the consistency of the relative position between the two mold boxes 2, making the opening and closing of the mold more precise.

[0042] It should be noted that when fastening the mold 6, depending on the specific situation, the centering clamping component 4 can be used to center the mold 6 first, and then the auxiliary locking component 5 can be used for auxiliary locking. Alternatively, the auxiliary locking component 5 can be used for initial locking first, then the centering clamping component 4 can be used for centering, and finally the mold 6 can be fastened. The specific process is not limited and will not be described in detail here.

[0043] The blow molding fixture provided by this utility model reduces the deviation of the movement trajectory of the mold box 2 and improves the positioning accuracy of repeated mold closing by cooperating between the linear guide rail 11 and the slider 12. Automatic centering clamping of the mold 6 is achieved by using the centering clamping component 4, ensuring precise alignment between the two molds 6. Adaptive locking mechanism 56 allows for adaptive locking of molds 6 of different sizes, improving the fixture's compatibility.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A blow molding fixture, characterized in that, include: The base (1) has two linear guide rails (11) arranged in parallel on its upper part. Two relatively movable mold boxes (2) are connected to the linear guide rails (11) by sliders (12). The opposite surfaces and tops of the two mold boxes (2) form open cavities. The support component (3) includes the support base plate (31) inside the mold box (2) and the support plates (32) at both ends of its bottom surface. The two support plates (32) are respectively aligned with the inner side of the opposite face and the opposite back face of the mold box (2) and fixed to the bottom plate of the mold box (2). The centering clamping assembly (4) includes a lead screw (41) and a guide rod (42) located below the bearing assembly (3) and mounted between the two side walls of the mold box (2). The lead screw (41) is mounted through a bearing seat (43). The two ends of the lead screw (41) are provided with threaded sections (44) with opposite helices. One end is also connected to a motor (45). The support plate (32) is symmetrically provided with clamping plates (46) on both sides. A vertical plate (47) is connected below the clamping plate (46). The vertical plate (47) is provided with a drive nut (48) that cooperates with the threaded section (44) and a guide sleeve (49) that cooperates with the guide rod (42). An auxiliary locking component (5) is disposed on the upper surface of the support substrate (31) for auxiliary fixing of the mold.

2. The blow molding fixture according to claim 1, characterized in that, The auxiliary locking assembly (5) includes a vertically arranged positioning base plate (51), which is fixed to the upper surface of the bearing base plate (31). A linear drive mechanism (52) is installed on the side of the positioning base plate (51) away from the mold box (2). The output end of the linear drive mechanism (52) passes through the positioning base plate (51) and is connected to the movable pressure plate (53). The movable pressure plate (53) has multiple guide posts (54) fixed on one side near the positioning base plate (51), and the positioning base plate (51) has multiple guide holes (55) that cooperate with the guide posts (54). An adaptive locking mechanism (56) is also provided on the side of the movable pressure plate (53) away from the positioning base plate (51).

3. The blow molding fixture according to claim 2, characterized in that, The adaptive locking mechanism (56) includes mounting seats (561) fixed to the four corners of the movable pressure plate (53), and a column (562) is connected between two mounting seats (561) on the same side. Multiple vertical adjustment blocks (563) are slidably connected on the column (562) along the axial direction. A horizontal adjustment component (564) is also provided between two vertical adjustment blocks (563) at the same height.

4. The blow molding fixture according to claim 3, characterized in that, The horizontal adjustment assembly (564) includes a horizontal slide bar (565) connecting two vertical adjustment blocks (563) of the same height. Each horizontal slide bar (565) is symmetrically provided with two adjustable pressure plates (566), and the adjustable pressure plates (566) are slidably connected to the horizontal slide bar (565). The adjustable pressure plate (566) is provided with a threaded hole (567), and the vertical adjustment block (563) and the adjustable pressure plate (566) are also provided with fastening bolts (568).

5. The blow molding fixture according to claim 2, characterized in that, The end of the guide post (54) is also provided with a limit block (541).

6. The blow molding fixture according to claim 1, characterized in that, A flange (20) is provided on the outer wall of the opposite side of the mold box (2).

7. The blow molding fixture according to claim 1, characterized in that, A rectangular discharge port (10) is provided at the center of the bottom of the base (1).

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